Fi Series 3 Smart Dog Collar Yellow - X-Large GPS Tracker

In this review of the Fi Series 3 Smart Dog Collar Yellow (X-Large) the bottom line is simple: this is for owners of very large breeds who want dependable, nationwide location tracking and long battery life. The reviewer found the collar excels at continuous, precision GPS tracking and gives clear health and activity insights through the companion app, making it easy to monitor dogs that range far from home. Setup is straightforward and the device stays secure on powerful dogs, so its greatest strength is reliable peace of mind for owners of large, active dogs.

Key Features

• Live GPS Tracking: Precision, always-on GPS gives real-time location updates with nationwide coverage so you can track a loose dog even when it leaves local areas.
• Escape Alerts: Lost Dog Mode triggers when your dog leaves a set area, letting you react immediately and save time finding them.
• Health and Activity Insights: The collar records activity, sleep, and behavior trends in the app so owners get context for changes in fitness or rest.
• Durable Design: A stainless steel profile, 400-lb tug resistance, and IP68/IP66K waterproofing keep the tracker working on large, strong dogs in wet conditions.
• Long Battery Life: Up to three months of battery per charge and a wireless charging base reduce downtime and frequent recharging.
• Included Membership: Six months of Fi Membership activates on setup and provides the collar band, customer support, and cellular service.

Who It's For

This X-Large yellow Series 3 collar is aimed at owners of very large breeds such as Great Pyrenees, Mastiffs, Newfoundlands, and Bloodhounds who need a rugged tracker that stays secure during strong pulls and covers wide-ranging outdoor activity. It also suits families who want combined location and health tracking in one device and appreciate lengthy battery life.

Those who should look elsewhere include owners of very small dogs under the collar size range and buyers who only want a proximity finder; models that depend on nearby phones will be lighter and cheaper. Also consider simpler GPS options if advanced activity metrics and membership services are not needed.

Pros & Cons

Pros

• Nationwide, always-on GPS provides reliable tracking beyond short proximity limits.
• Robust waterproofing and 400-lb tug resistance suit large, active dogs and rough conditions.
• Exceptional battery life of up to three months on a single charge simplifies ownership.
• Integrated activity and sleep data help spot health or behavior changes over time.

Cons

• Membership is required for full GPS service after the included six months, making ongoing cost a consideration for some buyers.
• The collar is sized for very large dogs and is not appropriate for small or toy breeds.

Specifications

Model	Series 3 Smart Dog Collar (X-Large)
Tracking	Live, always-on GPS with nationwide coverage
Water resistance	IP68 and IP66K waterproof rating
Tug resistance	400-lb rated
Battery life	Up to 3 months per charge with wireless charger
Membership	6 months Fi Membership included, activates on setup
Color and size	Yellow, X-Large

Our Verdict

The Fi Series 3 Yellow X-Large collar is a strong choice for owners of very large dogs who need rugged hardware, nationwide GPS, and long battery life. Its activity tracking and escape alerts add tangible safety and health benefits, though ongoing membership costs should be weighed. For those who value reliable location tracking and minimal recharging, it represents solid value.

Frequently Asked Questions

Does the collar work outside of wifi or nearby phones?
Yes, the Series 3 uses nationwide GPS and cellular service so it tracks your dog wherever coverage exists, not just near phones.

How long does the battery last between charges?
Expect up to three months of battery life on a single charge with typical use and the included wireless charging base.

Is the collar waterproof for swimming dogs?
Yes, the device has IP68 and IP66K ratings, suitable for wet conditions and water exposure common with swimming or heavy rain.